Thread: cutout switches

Hi, Carbatec also uses that system, at least on some benchsaws; it is bloody dangerous, to say the least...if the overload switch kicks in, when you reset, it starts with no warning!
Bad recipe for any fingers close by!
We have one of those in our club, glad to report it is being thrown out soon!

hmm...so it is legal, even though pretty bad. I have old gear that has no cutout switch and my problem was brief power outages of maybe 5 seconds or so. So _really_ dangerous.

I think I will change this one.

Originally Posted by REALOldNick

hmm...so it is legal, even though pretty bad. I have old gear that has no cutout switch and my problem was brief power outages of maybe 5 seconds or so. So _really_ dangerous.

I think I will change this one.

It's interesting to note that even the humble Triton was fitted with a safety switch when sold in the UK. Unfortunately we are under regulated in the hobby tool market, if those items were sold into schools or industry they would need to be retrofitted with a No Volt Release switch to comply with OH&S rules.

Regards

Gragame

Yeah sometimes EU is a bit granny, but I really was surprised that this one got through here, these days. Once I used a machine with the "proper" switch, I would not happily go away from them.

Thanks for the pointer on the NVCO switches.

from an electrical regulatory point of view I do not believe there is any requirement that I know of for a DOL starter (no violt switch) on any equipment.

Any requirement in an industrial workplace will come under OH&S....but I do not believe there is a specific legeslative requirement.

I would be very surprised to see such a machine in any caring workplace with out one though.

It would come very high on the list in any risk assessment.

They are easy enough to obtain and straight forward to fit.

cheers

My bandsaw is in the same boat. Anyone know of a good source for a reasonably priced switch?

Almost any electrical wholsaler should be able to supply... but..I got my last one from Garry Pye as a jet spare part.

cheers

https://secure.vividcluster.crox.net...=22&SUBMIT.y=8

Hi

Let's be clear there are many types of switches. A true safety switch a.k.a Direct Online Starter has a contactor or relay that ensures the the switch only works when there is power available i.e. No Volt Release.

Other safety switch look alikes are usually just on - off switches adapted with a mushroom head on the stop or a paddle as per the Triton version, some have a latching off button. In some applications this is all that is needed e.g. dust extractors. However, IMHO true NVR switches should be used in any fixed cutting application, router tables, saw benches etc.

Most DOL starters also have a built in overload protection, which realy isn't needed where the motor has its own protection

I hope that this clarifies the situation a little.

Regards

Grahame

Originally Posted by Gwhat

Hi

Let's be clear there are many types of switches. A true safety switch a.k.a Direct Online Starter has a contactor or relay that ensures the the switch only works when there is power available i.e. No Volt Release.

Good point.

Last time I looked, RS components had 240V 10A no volt release assemblies for about $35 and a similar assembly as a spare part for an MC900 wood lathe from Hare and Forbes was $20. Both are the familiar green and red button in black housing with clear rubber over the top to keep a bit of the dust out.
Hope this helps a bit.

WooHoo! Ok. Thanks. I was trying to replace a smashed one on an extractor from timbecon and said they had none

OK Both dem sites is powful big. Any narrowin? I mean u dun looked an all

Originally Posted by REALOldNick

OK Both dem sites is powful big. Any narrowin? I mean u dun looked an all

Yeah the RS site is huge. Farnell are about the same, they must spend so much $ keeping it up to date.

The page of no volt switches they carry is here:
RS Australia | World Leading Distributor of Electronics, Electromechanical and Industrial Components

Beware that they do stock some 115V switches which are NOT suitable for Australian (240V) supply.

These are the two I was looking at:

Attachment 172151

$33 ex GST

EICHOFF | Relays, Switches and Indicators | Switches | Push Button Switches | Switch Disconnectors - Fuses |3251-20-01/52

Attachment 172152

$37.60 ex GST

EICHOFF | Relays, Switches and Indicators | Switches | Push Button Switches | Switch Disconnectors - Fuses |3251-21-01/52

I see that the clear dust cap I mentioned was on one of the 115V switches so it would be no good.

The smaller fifth lug on that first switch is for adding in extra safety/convenience stop switches.

Do me a favour and have a chat with a registered repairer or sparky and they will be able to give you the final yay or nay. I can show you where to shop but I can't help you wire it up, sorry.

Good Luck